What causes diarrhea? Specifically why and how is a virus causing the body to expel massive amounts of water? |
- What causes diarrhea? Specifically why and how is a virus causing the body to expel massive amounts of water?
- How does COVID damage the lungs?
- Why do most animals have their eyes, nose, and mouth clustered together in roughly the same way as other species?
- Statistics on post-vax infection?
- How does rain effect cigarette smoke/the diffusion of odours?
- Why is there very little atmospheric ash produced by the dramatic volcano now active in Iceland? The last newsworthy eruption caused immense ash clouds that shut down airports and diverted air traffic across Europe.
- Do different objects/substances feel colder based on their ability to transfer and absorb heat?
- If there was a sphere around earth, say 1 light year away, and someone on earth pointed a theoretical laser that could reach the inside of that sphere, and that someone moved that laser swiftly from one horizon to the other... would that observable laser dot move faster than light?
- Since there are rogue planets roaming the galaxy without a host star, are there also rogue stars roaming around intergalactic space? Rogue solar systems?
- What is the mechanism by which veins clot after venipuncture?
- How is the asthenosphere defined?
- Is there a function or evolutionary reason for the distance between between the eyes and the occipital cortex where vision is processed?
- How do galaxies move and do they all move in the same way/speed?
- Can someone explain IAS (indicated air speed), TAS (true air speed), and groundspeed, and the difference between them?
- What percent of US have Covid antibodies?
- Has any group of animals that evolved from water to land and then back to water ever developed the ability to breath in water?
- Is it possible for there to be no b-cell with the appropriate antibody for a pathogen... or any substance, for that matter?
- What are the specifics of why muscles twitch?
- How are covid vaccination rates calculated? Are all people counted in the percentages, or just the ones that can possibly be vacinated? Now that children over 12 can take the vaccine, do the percentages go down for total vaccination rates?
- Is the Y chromosome passed from father to son unaltered?
- Is it possible, that 'new' stars appear in our skies over the years?
| Posted: 13 May 2021 09:37 PM PDT |
| How does COVID damage the lungs? Posted: 13 May 2021 11:23 PM PDT Read a lot about how harmful COVID can be to the lungs. Heard from an XRay tech that COVID lungs are almost white on the XRays. Don't understand how it can cause that. What is in the virus that harms the lungs? And how is it different from other diseases, like pneumonia? [link] [comments]  |
| Posted: 13 May 2021 02:40 PM PDT Why are the eyes usually horizontally aligned, with a nose centered on the face and a mouth slightly below? What are the benefits of this over say having the eyes and the mouth on opposite ends of the body? [link] [comments]  |
| Statistics on post-vax infection? Posted: 14 May 2021 07:33 AM PDT An article on an outbreak in the Yankees organization makes me wonder how rare or common this is. The team had routine testing and eight vax'd members tested positive. All but one had no symptoms at all and the last had sufficiently minor symptoms he thought nothing of it. I imagine relatively few vaccinated people go on to be regularly tested, so asymptomatic infection/recovery might be common and largely undetected. So two questions: Is there any tracking or any studies on prevalence of post-vax asymptomatic infections? Is there any evidence pertaining to subsequent transmission by such individuals? [link] [comments]  |
| How does rain effect cigarette smoke/the diffusion of odours? Posted: 13 May 2021 11:09 AM PDT I have just moved in opposite a flat full of very ignorant students. They smoke out of their kitchen window from about mid-day till 3-4am, which means if I have my windows open at any time that they are awake the smell of the smoke travels across the street (which is very narrow) and into my flat. Today has been very rainy and I have left my window open in my bedroom for several hours and have noticed that I haven't smelt any of their smoke, even though they have been smoking as usual. I wondered whether the rain has an effect on the diffusion of the smoke particles as they travel across the street and if so how? Or is something else sciency happening? I'm just really curious to know why. [link] [comments]  |
| Posted: 13 May 2021 12:25 PM PDT |
| Do different objects/substances feel colder based on their ability to transfer and absorb heat? Posted: 13 May 2021 09:48 AM PDT For example, a when I grab two objects after being left alone overnight one may feel colder, but they would be at the same temperature right? Like aluminum versus cloth, is it because the aluminum just absorbs my body heat faster and "appears" colder or how else would this work? [link] [comments]  |
| Posted: 13 May 2021 07:58 AM PDT I had to shorten my title/question to fit. I hope it makes sense [link] [comments]  |
| Posted: 13 May 2021 03:07 PM PDT |
| What is the mechanism by which veins clot after venipuncture? Posted: 13 May 2021 01:57 PM PDT Hi askscience, I am aware of the clotting mechanism for arterial injury (primary and secondary haemostatic plug etc), but what is the mechanism by which veins stop bleeding after a blood has been taken? Thanks [link] [comments]  |
| How is the asthenosphere defined? Posted: 13 May 2021 04:18 PM PDT I'm interested to know how we define the top and bottom of it, whether the boundaries are sharp or gradual, what fine-scale properties make its rheology different from the lithosphere (and whatever mantle material is below it, if anything), and if there's any geophysical means of imaging it. I'm aware of the mineralogical/geophysical boundaries at 410 and 660 km depth, but those seem to be totally unrelated. Additionally, back in my undergrad mineralogy class, I learned the term "mesosphere" for the mantle layer below the asthenosphere. I've never heard it since for describing anything in the mantle. Is that term still in use? [link] [comments]  |
| Posted: 13 May 2021 11:02 AM PDT The part of the brain that does the heavy lifting for visual processing seems almost intentional placed as far from the eyes as possible. I would have expected that vision, being a moderately old sense in evolutionary terms, would have developed those organs closer together given they would have developed in the context of much smaller brains. Is there some functional advantage to this distance, or is it just an unknown structural quirk? [link] [comments]  |
| How do galaxies move and do they all move in the same way/speed? Posted: 13 May 2021 10:15 AM PDT Galaxies are gradually moving apart as part of the expansion of the universe, but I'm more curious about movement at a smaller scale. For example, the Andromeda galaxy will collide with the Milky Way in the distant future. Is this just regular high school physics gravitational attraction (as one documentary explained it) or is something else going on? [link] [comments]  |
| Posted: 13 May 2021 07:38 AM PDT |
| What percent of US have Covid antibodies? Posted: 13 May 2021 01:49 PM PDT I assume this answer will be the sum of people with at least one shot of vaccine or previously infected and now recovered. But less the overlap. This would seem to be a key stat in anticipating herd immunity, but I've never seen the composite number estimated from available data. [link] [comments]  |
| Posted: 13 May 2021 11:49 AM PDT |
| Posted: 13 May 2021 05:36 PM PDT Based on my understanding, b-cells randomly generate their surface antibodies. When it, encounters an antigen, should it also be graduated by a helper t-cell, then it proliferates and fights the infection. I understand the immense amount of b-cells and that they each have tons of surface antibodies. But I wonder if it's possible that there is no 'matching' antibody present in the body. Given that there is a finite amount of membrane-bound antibodies in the body, doesn't that make it possible that there is no b-cell to produce antibodies against a disease or any antigen for that matter? Whether it's probable or not, I simply wonder if it's a possibility. Though, since the body is constantly making new b-cells, maybe one, assuming there isn't already a matching one in the body, will be generated at some point in time? A detailed explanation would be appreciated, but any information is too. Thanks! [link] [comments]  |
| What are the specifics of why muscles twitch? Posted: 13 May 2021 01:40 PM PDT I looked it up and found things like muscle stress and fatigue but I want to know what happens at the individual level. What happens in the body that causes a muscle to twitch involuntarily? Does the muscle get a signal from a nerve, and if not, what at maybe the cellular level makes it do that? [link] [comments]  |
| Posted: 13 May 2021 09:02 PM PDT |
| Is the Y chromosome passed from father to son unaltered? Posted: 13 May 2021 10:11 AM PDT My understanding of genetics is that gametes hold DNA that isn't a random splitting of the pairs of chromosomes of the parent. E.g. for chromosome 1, you have 1a and 1b, but a sperm cell will not hold either 1a or 1b, but a combination of both, through various exchanges of genes ("chromosomal crossover"?) between chromosomes during meiosis. However, one pair of chromosomes cannot go through this process. The XY pair will be split and some sperms will receive the Y chromosome, and my question is: is this the exact same Y chromosome of the father? Or did it recombine / crossover with the X chromosome somehow? In other words, and spontaneous mutations aside, as a male, do I have the exact same Y chromosome as my father had, and his father before, and my great grandfather before, etc.? [link] [comments]  |
| Is it possible, that 'new' stars appear in our skies over the years? Posted: 13 May 2021 10:35 AM PDT What I mean is; as the years go by and the light from distant stars travel further toward us, is it possible that we could one discover a new super bright light from an ultra massive undiscovered space phenomenon? Or do we have a limit to how far we can actually see through space? [link] [comments]  |
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